On 21/11/2017 16:13, sm_jamieson wrote:
On Tuesday, November 21, 2017 at 3:52:10 PM UTC, The Natural Philosopher wrote:
On 21/11/17 13:08, sm_jamieson wrote:
My fireplace is made of tiles - stuck over a former which seems to be a mix of concrete and iron strengtheners.
The tiles were originally stuck by bedding in some type of cement product that is very tough and I cannot remove it without damaging a lot more of the fireplace. So I need to "glue" back the loose tiles.
The fireplace is not used much and will not need to withstand very much heat.

The glue needs to be very thin so the replaced tiles are not noticeably proud of the others - so probably not epoxy or contact adhesive, or tile adhesive.

So which glue to use ?
1. PVA - probably would work to some extent
2. PVA + SBR - a bit better than 2.
3. PVA and/or SBR + cement slurry
4. Gorilla glue - oozing edges might be a pain
5. Anything else ?

Simon.

epoxy is as thin as anything else and if set with a hair dryer or heat
gun will stand temps up to around 150-200C

I am only used to araldite. Where can I find a more runny epoxy glue ?
Simon.

Pop the tiles in the oven at about 100 C. Put a gloop of standard (not
rapid) araldite near each corner and you will find it gets much more
runny as it warms up. Apply.

Wear suitable gloves, obviously.

Or you can melt the mixed stuff in a spoon over a gas cooker or small
gas torch, but you need to get the timing right because when it sets, it
goes quickly. With practice, you get to recognise the signs.